Locomotive boiler



April '1927' A. wf BRUCE LOCOMOTIVE 'BOILER original Filed oct. 123, 1925. 5 shee'sfsheet 2 oooco'ooocoo @ooooouoon ooooooooo oocoo.o.ooo. ooo ooo ooo-ooo ooo ooo oooooooom oooooooco 0.oooooooc O O @0G00 @O0 WI-TNESSESQ- Original Filed Oct.

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April 12, 1927.

A." w; BRUCE 'LQQOMOTIVE BOILER WITNESSES 5L.. f fm 64.347 filod'ooeaa, 1925.

l Patented Apr.I 12, 19a?.

`Urilriezn*STATES! linfrlsN ALFRED w BRUGE, or Nnw Yoan, N. Y.

,iLooon-tomrvn IBOILER.

continuation offoppiioaaon serioi 1ero. 64,347, med october 2a, A1925, and' in This application inea January" 27, 1927. serial No. 164,031.

Thisapplicat-ion isj acontinuation of my application for 'Letters .Patent. "Ser.- No.

My 'invention relatesI to locomotive b oilers of the general class or type in which the side walls y of the fire box are --formed'of water tubes, and comprisesv aconstruction in whichv all staybolts may .bel omitted. in the fmost 'highly heated parts of there box, and provides Afor increased heating surfaces and more rapid circulation, with the result that greaterefticienciesper pound of coal are more f `readily obtained'.` l To this-end, 'in my improved construction I employ a hollow mud ring'on'-xthe sdes and ends ofthe re box base, into which are 'connected rows of 'verticalj water tubes, which form the side walls of the fire box. The water .tubes are of the same'sia'e and shape and may be interchanged and removed without disturbing' other meinbers of the lire box leading into a' steam drum, whichextends into the barrel ofthe boiler and affords properv circulation between l the boiler barrel and tire box heating spaces.

I also provide proper control of the flowcf steam between the water levelof the boiler' and the steam dome, and thus. prevent the carrying'over of water into the dry pipe. These andj'various other objects vare v.effected in my improved construction Without alter'- in'g' the size and shape of the boiler,which, lin vgeneral contour Aand exterior arrangement, is similarto the boilers now` in use. My invention also comprises the various features .which I shall hereinafter describe'and claim.

vThe improvement claimed is hereinafter fully set forth.

lIn the accompanying drawings: Figure. l is a 4vertical llongitudinal central section through a locomotive boiler embodying lmy invention; Fig. 2, ia one-'half horizontal longitudinal `section through t-he middle plane of the vboi/ler; Fig. 3, a View, in elevation,

of the back head of thefboilcr; Figs. 4 and '5, vertical.sections,fon the lines IYIV and- V-V. respectively, of Fig. 1; Fig. G, a plan of the hollow mud ring; Fig. 7, a front View, partly in scct ion.'of the mud ring; F ig. 8, a similar section through the mud ring, on the line VIl-VIII of Fig, 6; Fin'. 9, a'.'simila1 section, showingl an alter- -native c onstruction for theattachment of the mud ring to the boiler barrel; Fig. 10, aver-v modified form by staybolts,

' 'aty their upper ends', with tical longitudinal 4central-section, showing` the applicaton of my invention in a locomotive boiler having a combustion chamber;

T 'lorries' canado october 1s, 192e. y f

XIIL-XIII, and XIVeJXIV, respectively,

of Fig. 10; Fig. 15, a section, on the line "zXV-fXV of Figl 13; and, Fig. 416, a vertical transverse section' through the fireboX of a steam drums instead of one of niyinvention, in vwhichao'oioox, A, tho boilerV barrel, B, through which extends a plurality of fire tubes, l, in the ordinary manner, andthe smoke box, (l. The forward endof the fire box, A, is connectedI bA athroat sheet, l2, to the boiler barrel, lg, and the mud rin 3, in the usual manner, anda back hea ,of

the usual form, made up of. ltwo spaced' 5 and 6, with outal apartsh'eets or plates, wardly extendin flanges and vsuitable cover plates, .the two s eets eing s tayed together 7, thus providing a Water space between the plates, 5 and 6'. The back head is provided withal-suitable tire door. opening, 8, and an opening, 9, for the water drum manhole cover, 91.l The mud ring, 3, is hollow and preferablyintegral. It communicates with, vand forms the bottomsupport of, a pluralityof water tubes,.10, which are set closely together, forming the side walls of the vlire box, and are connected, a steam drum, 11, which extends horizontally and 'forwardly into the barrel, B, of the boiler.

`Connected to the front end of themud ling, 3, and extending upwardly and rearwardlyto thev back head, 4, are arch tubes,

12, which support the fire brick arch, 13', in' a manner similar to the :usual construction.- The upper-surface of the grate, 14, lies approximately in the plane of the top surface of the mud ring,'3.

The fire box, A, is lconnected to theboiler A`barrel, B, back flue sheet, 22, and throat sheet, 2, l.by a roof Orwrapper sheet, y1.5,

I which-is wholly independent of proper, is preferably, vcentrically with the the firebox as'shown, curved conboiler barrel, and perrimarily the function of a rigid forms for the fire box and Connecting member 'boiler barrel, and `secondarily, that of a closure or housing vfor box, to prevent the "fit is, in the operation thereof, continuously escape of gases of comf bustion therefrom,'without being, or being required to be, a member performing the function of the ordinary wrapper -sheet lmown in practice, i. e., that of. forming the-'wall of a steam space in a boiler, where subjectto internal pressure. Suitable lag'- ginger insulatinfr material, 16, 1s provided between lthe outside of the water tubes, 10,

I 'and the inside ofthe wrapper sheet, 15. i

' apertures 18 and 18,

i ends of the side tubes,

tubes, l2, respectively,

- wall tubes,

vhas an apertured forfor a suitable elbowconnecbarrehB, with the forward side of the mud ring, and supplies the mud ring with feedwater for theside wall tubes, 10, the arch tubes, 12, and the back head,`4. The mud ring has, in itsupper surface, spaced apar-t'A for the reduced lower 10, and for the arch which may be securedto the mud ringby upsetting of their v ends on the inner surface of the top plate of the mud ring. Communication with the hackY head, 4, is provided through the apertures, 181. The mud ring is provided with detachable bottom cover plates, 19, which permit access to the lower ends of the side 10, for setting, cleaning, etc. The top of the mud ring has vertical flanges, 20, for connection with the throat, roof and side sheets, and also horizontal flanges, 21, for connection of 4the back head, :4. The bottom of the ring at-front and back, is-

" provided with the usual flanges and connections for the lire box supports.

The steam dome, 23, is connected, in the usual manner, to the top of the cylindrical barrel, B, at a point between the back tube sheet, 22, and the front end of the horizontal steam drum, 11. `Fronrthe steam dome, a dry pipe, 24, extends forwardly through thev front tube sheet, 25, to a'throttle valve (not shown) in the smoke box, C, in the usual manner. Between the top of the steam drum and 'the top of the cylindrical barrel, B,

' drum, 11, passes upwardly and then forwardiy 'through the -are interposed circulating plates, 26, which forma channel through..which steam delivered from theforward end of the steam and back to the dome, 23, I dry pipe, 24. Steamwhich is formed within the cylindrical shell of the boiler barrel, B, and below 'the steam. circulatingplates,

' 26, ispalso com elled to pass forward of the forward en of the circulating plates ,and thenupward and back tothe dome, 23,

the top of the fire.

ring, 3,

4is provided with an aperture,- 3",to permit the water from the barrel, B, to feed directly into such forward portion of the m-ud ring.

a further structural modification of my invention, in which the vfire box, A, has been increased in length sd as to include a combustion chamber, D.

of dry steam fou In Figs.`10 to 15, inclusive, I have shown The side walls and part of the top of the combustion chamber are formed of Water tubes, 10a, which conform in shape, abovel the centre of the boiler,

to the side tubes, 10, and, below the centre of the boiler, are substantially semi-circular in shape. The tubes, 10, are connected, at their tops, their bottoms, to a header, 31, which, at its front end, extends through the throat sheet, 2, and communicateswith the boiler barrel, B, and, at its back end, v terminates against the front face of the mud ring, 3, and thc.

lower forward face of the fire box arch, 13.`

The header, 31, provides a water passage from the boiler barrel, B, to the bottom ends of the water tubes, 10, of the combustion chamber. This Water passage through the header, 31, is separate `from, and has no connection'with, the water feed to the mud ring', 3, through the watersupply member, 17. The header, 31, is provided with removable bottom plates', dered accessible bj talking down the water supply member, 1 are covered by ,suitable lagging, l16, on their outer faces, which lagging is held in place by a light metal jacket` 33, the lupper end ,of

which is fastened to the wrapper sheet, 15, and the lower end to the header, 31. The space between the rear end of the. jacket, 33, and the top of the mud ring, is filled with a fire brick wall, 34, which is supported on top of the mud ring, 3, and is held in position bv the removable gusset plates, which form a backing for the brick wall, 34.- The The water tubes, 10,

to the steam drum, 11, and, at y 32, which, are rengusset platesare held in position by the tie plates, 36.

The lagging between the wrapper sheet, 15, and the tubes, 'l0 and in plastic form, or in the shape of preformed blocks. i n

My improved construction attains the 'following advantageous results, towit: the elimination of staybolts in the 'fire-box zones 10, maybe applied which are subjected to intense heat, with av boiler barrel, which compels proper circulation between the barrel `and the' lire box consequentgreat saving in mai-ntenance; a' substantial increase in heating surface, vwith r(onsequent improved water circulation; the

'the use-of a hollow mud ring to supply feed water to the tubes and .b a'fk head and detachable bottom plates therefor, providing access to the'bottoms of the side tubes; by

making the ring integral, a stiifening ofthe wholel fire box-structure is effected, and trouble with' water tight joints and connections is eliminated; the forward extensionof the steam drum to the forward portion of the heating; spa ^es, and eliminates the carrying' over of.' water into the dry pipe; andthe retention of the usuahshape of the fire box; which permits the use. of the ordinaryc'ab and other attachments.

Fi g; 16 shows' a, further structural modie lication lof my invention in .whicl'ifa pair'of drums-'11, 411, il'isteadpof a'single drii'iii,"'is

into one of the drums, 11, and thedrums are preferably7 noteonnecte'd, lso that the steam from each ilowszforwardly'into the barrel,

las in the otherffo'rnis of inyinrention.4 The space between'-the drums is closed by a fire-' resisting wall, .37thuscompleting the. en-

closure of thefre box. i

I claim as my inventionand desire to secure by Letters Patent:

1. In a loz-oinotiveboiler. vthe combination' of a barrel and a ire'box; the fire box having a steam"diii m at' the top thereof, side" wall water tubes leading -into said drum, a hollow mud ring connected to the bottoni of the tubes to supply f ecd wa'ter therefor; and

a wrapper'sheet rigid-ly secured to the 'bar'rel and the fire box. forming,a ,.s'tifi`ening means for theparts of the fire box, and a housing for the sides and top of'the 'fire box.

Q. In a lo'comotive boiler, the combination Yo'fa fire box comprising a hollow mud ring,

a back head having water communication with the mud ring, side water tubes connected attheir lower .endsto the mud ring, a

water drum iiito whichthe side tubeslead; a barrel; awrapper sheet securing the. back head. barrel, and fire box: 1"'igi'dly""t'ogetlier and forming a stiffening means and a hous-v ing therefor; anda feed connection between the forward side of the mud ring and' the barrel. whereby water received from the bar" rel is-fed to said tubes', back head and `drum. v

.. ing a header witli`'which} the` tubes 'infthe 139 3. In aflocomotive boiler, the combination ing the forward Napplied. fEachf'set of side tubes', '10, leads.v

of a barrel; a steam doin'e and a dry pipe therefor; a lire box; a hollow mud ring forming vpart of said fire box and disposed so as to4 receive feed water from the barrel;

- a drum; watertube'sin thc ie box conncct- 7" ing the, mud ring and the drum, the di'iiiii extending from therear end ofthe fire box to aapoint forward of the dome; and means forpreventiiig the 'steam from the 'drinn or barrel 'from carrying waterover into the 75 dry pipe." f

4:.'111 a locomotive boiler, the -combination of a barrel; a'steam dome and a dry pipe therefor; a 'fire box a hollow mud vring forming part of' said lire-boxdispoged so as 80 to receive feed water' from the barrel; a drum; water tubes inthe'fire.box,`conncct ing the 'mudring and-the drum. the drum extending from the rear end of the fire'bo'x to apoint forward of the dome; and plates S5 associated-with the v drum for preventing 'the from: the barrel from "carrying ywater 5.' I n a. locomotive boiler, t he combnatioii. l`

of a barrel lund a lire box; the vfire box hav-5 90 -ing asteam-drum at.' tlie'top thereof; side walls formed of water tubes leading into Saiddrum; a' hollow mudring connected to.

'the bottom ,ofy the tubes'and supplying feed water therefor; :1 -.combustion chamber forin 95 i'lij'Q-the fire box; anda'nvv Y wrapper sheety securing the barrel vand fire box rigidly together, andforming astiffen: ing means' and a housingfor the sides and top ofthe fire box and combustion c haiiiber.v .100 l 6. In a locomotive boiler, the combination of a barrel; a fire box, comprising a com# bustion chamberl and a` re chamber, the

- combustion chamber terminating in rear of lthe'barrel'; a back head, closing therein-'of 1 "5 the fire chamber; a 'di-uin, extending for# Wardly from the baf'khead, through the fire and combustion chambers; side' water tubes..l connected to said drum, and forming therewith the sides and rooffof the reand coin# Wl bustion chambers; .means for feeding'water from the barrel to the side water tubes and .a wrapper, sheet, secured to the barrel 'and to .the firebox', .and performing 'the .filmt-ions of rigidly connecting said members -together. )l5

' land forming a housing, coveriugthe roof of vthe fire' box. .v 'i'. In a locomotive boiler, thejcombiuatii'm of a barrel; a fire box. comprising a 'combus-f ltion chamber and a fire chamber, the com? 1? bustion chamber terminating in rear of the barrel; a back head,y closing` the rear of the fire chamber; a drinn, extending forwardly from the vback head, through the fire and combustion chambers; Iside water'tubes. conl'l" `nected.to. fsaid drum, and forming therewith the ysidegiifand roof of the lire'and combustion' ehiunbers;l meansffor feeding water from' thebarrelto the water tubes, compris- 1combustion vchamber are connected and a mud ring with which the tubes inthe lire chamber are connected; and a wrapper sheet, secured' tothe barrel and to thefire box, and

performing vthe function of rigidly connecting saidl members together,` and 'forming a housing covering the roof of the vir'ebox:

8. In a locomotive boiler, the combination.

A'of a barrel; 'a fire box, comprising a combustion chamber and a fire chamber', the combustion chamber terminating in rear of'tlie barrel; aback head, closing the rear of the fire chamber; a 'di-um, extending forwardly `fromjthe back. head, through the fire and combustionl chambers; s id'e ,water tubes, connected to said drum, and forming. therewith the sides androofof the tire and combustion chambers; a' throat sheet lling in'thetri-v angular side spaces-at the front' of the combastion chamber; and a wrapper sheet, se-

cured to the barrel, the throat sheet, and the` fire box, and performing the-function of rigidlyv connecting said members together,`

and forming a housing coveringthe roof of the fire box. 9.v In a locomotive boiler, the combination 'of-a barrel and a fire box, the fire box com.` -prising a drum, a hollow mndl ring,- side tubes'V connecting tlie-mud ring and drum; a

back head, connected to the mud ring;an"d.

.a wrapper` sheet rigidly securing the mud ring.` back head, and barrel to, .,rether, and forming a stlfening means therefor.

l0. In a locomotive boiler, the combina comprising a drum; a hollow mud ring; side lubesconnecting the mud ring and drum; a back head, connected to the mud ring; a-

back head and barrel together, and forminga tion of a barrel and a fire box; the fire box 'wrapper sheet rigidly securing the mud ring,

. stiffening means therefor and insulating ma- .jur

and the barrel. the top connectie ferial between the tubes and wrapper sheet.

1l.' Ina locomotive boiler, the .cornbinalfv tion of a barrel; a steam dome at -the 'top ofthe barrel;- a fire box; `watertube theI sides of ,the fire box; circulating con! nertions between vthe tops and bottoms of the ytubes andthe barrel, the top connection Y.barrel .at .fapoint in er, the combinadome at the top of r tubes at the/ sides of the. rre box; circulating connections.'

between the-tops a'ndfbottomsjof said tubes.-

dome; and circulating platesVbet-wee'n the j top connection and the .barrelyfxtendi ig -from the 'rear` end of the barreltoa poi t forward of the steam dome,"v whereby stea i fromthe upper portion ofthe; barrel is vcaused to pass forwardly ofsaid plates to reachtlie steam dome.v

'13. In a locomotive boiler, the combination of a barrel; a steam dome at the'top of the boiler barrel;'a fire box comprising aA fire chamber and a combustion chamber;

water tubes at the sides of the fire chamber and combustion chamber; circulating con- 17, Ina locomotive tion of a waist or barrel, having a plurality of fire' tubes; and a fire box, theforwardl nections between the tops and bottoms of said tubes and the barrel; the top connection in the bairel vextending forwardly of thesteam dome and disposed-so as to de liver the circulating water and steam geri- ,erated in the re `box into thebarrel `at a' point in advance of the steam dome. 14. In a locomotiveboiler, thecombina- 'tion ofa barrel, a fire chamber and a 'com bust-ion chamber disposed end to end, the fire chamber being of greater cross section than the combustion chamber; and having al hollow mud ring through which feed Water is supplied to water heating spaces'about the fire-box; a brickwall supported by the mud ring and filling the space in the end of the fire chamber which extends beyond the combustion chamber; and 'a wrapper sli-eet, secured to the barrel'and to the fire box, and performing the function of rigidly connecting said members and formingl a .housingcovering the roof of the fire lbox and `combustion chamber.

15. In' a locomotiveI boiler, the combination of a barrel and afire box. having a fire.

chamber; a; throat sheet securing .thcbarrel and fire box together; a' mud ring; insulating materiah ,supported by the mud ring, exposed to the interior of the fire chamber and filling 'the triangular spaces between such chamber and the boiler s iell; andl removable means for holding-the insulating material inposition.

tion of a barrel -and a re box; water spaces "about" the fire box; a drum', into which the water spaces lead, extending forwardly into the forward part of the barrel; and a dry pipe housed in the drum and extending for-4 wardly in the barrel. f

` boiler, theI combinaend of the fire boxv being. disposed to the rear of, -and connected to the rear of, .the barrel, the portion thereof forward ofi-ts grate containingl a combustion chamber, said fire box comprising a water space back head communicating with the barrel, a hollow niud ring,.an upper steam delivery drum,

and waterv tube side walls connecting the 'drum aiid mud ring; and a wrapper sheet,r

secured to the barrel and to the firebox, and performing the function of rigidlyseeuring locomotive. boiler, the combina-- said members together, and forming a hous` ing covering the roof of the fire box.

` 1, ALFRED IV. BRUCE. 

